LablTk is an interface to the Tcl/Tk GUI framework. It allows to
develop GUI applications in a speedy and type safe way. A legacy
Camltk interface is included. The OCamlBrowser library viewer is also
part of this project.

Log message:
Update to 8.06.3; fixes build with current pkgsrc ocaml. (Except I had
to revert one line of one of the upstream changes which apparently
only works with newer ocaml than we have.)
Upstream changes: minor fixes, and updates to match newer ocaml versions.